Method of reducing the inflammability and explosiveness of hydrocyanic acid



- July 192$.

FRIEDRICH KERSCHBAUM, OF FBANKFOBT-ON-THE-, GERMANY, ASSIGNOR TO THEBOEBBLEB & HASSLACHEB CHEMICAL COMPANY, OF NEW Y0:

POBATION CF NEW YORK.

METHOIC OF REDUCING THE INFLAMMABILITY AND EXPLOSI VENESS OF HYDRO-CYANIC ACID.

- in) Drawing. Application fi led December 23, 1925, serial No. 77,384,and in Germany December 27, 1824.

The object of this invention is to provide a means for stabilizingliquid hydrocyanic .acid against explosion and to reduce itsinflammability. I have found that the de- 6 sired result may be obtainedif the hydrocyanic acid is mixed with' liquids which ab-' sorb heat ondecomposition-or polymerization of the liquid hydrocyanic acid and whichcan be vaporized without decomposi- 1 tion. The liquids to be usedshould preferably be fairly volatile and readily mix the hydrocyanicacid so that they will be vaporized along with the h drocyanic acid. Afurther use can be ma e'of these liquids if 15 they themselves are, forexam le, insecticides. Liquids which I have, ound suitable for thestabilization are tetrachlorethylene, trichlorethylene and the like. Theamount of-these liquids to be added to the 20 hydrocyanic acid and. theparticular'liquid to be used degends on the degree of stabil-.

ization desire For the prevention of explosion of liquid hydrocyanicacid a much smaller amount is suflicient than is necessary 2 forreducing its infiammability.

Thus, for example, if I add 50 cc. of tetrachlorethylene to a liter ofhydrocyanic acid I secure a very considerable reduction of theexplosibility of the liquid hydrocyanic acid whilst about 3 times asmuch will prevent the ignition when the mixture is touched with a match.

What I claim is:

1. Method for reducing the inflammability and explosiveness ofhydrocyanic acid which consists in mixing a volatile non-inflammableliquid with the hydrocyanic acid.

2. Met 0d forreducingthe inflammability and explosiveness of hydrocyanicacid which consists in mixing tetrachlorethylene with the hydrocyanicacid.

3. A product of manufacture consisting in hydrocyanic acid mixed with avolatile non-inflammable liquid.

4. A product of manufacture consisting "in hydrocyanic acid mixed withtetrachlorethylene.

Signed at Frankfort A/M. Germany, this 5th day of December A. D. 1925.

, FRIEDRICH KERSCHBAUM.

N. 2., a con

